A: A blood moon is a deep reddening of the moon caused by the Earth passing between the moon and the sun. During the period of the eclipse, light from the sun... Full Answer >
Sometimes, bones are the only accessible source of DNA, thanks to their structure, which preserves DNA comparatively well and for a long time. The main problems of DNA extraction from bones are DNA degradation due to environmental factors and the presence of soil-derived inhibitors like humus acids [1â10].
We soak the bone powder overnight in an extraction buffer, a substance that melts the bone and collagen and releases the DNA into the solution. Now that the DNA is in solution, we need to get it out. To do that, we do whatâs called a silica extraction.f any DNA remains, it may be only a minuscule amountâpossibly just a single molecule. Touching the specimen could introduce more modern DNA than there is left in the ancient bone, so the technician guards against contamination by wearing gloves and bathing the work area in ultraviolet light to kill bacteria.